You can use the update mechanism to update from earlier builds of 1.2 as well as from version 1.1 (stable). Note that the build is only available in the beta channel, not the stable channel, so if you are not offered the update you need to switch to the beta channel (to change channels, open the preference dialog, go to the Updates category and change the channel setting).

However, if you update from 1.1 to 1.2 beta 3 note that this will replace your current installation. You can keep 1.1 and 1.2 installed side by side (they use separate settings directories) so you can go to the Android Studio 1.2 Beta 3 page and download a separate installation if you prefer. If you patch update to 1.2 and want to go back or have both installed, you can also Download Android Studio 1.1.

Problems?

If you run into problems, be sure to check the Known Issues page which we'll update as necessary.